Oh no!! Your nemesis...pukey tot! (mine too if it is contagious) You will have to use all your superpowers to stay calm.
Probably it was a case of too much cake and running around...and not something that could be 'shared'...and you were not really exposed anyway if you were simply nearby...
I think this is what you were referring to...the guided meditation for physical symptoms? If not, let me know and I'll find something else...
12 Minute Meditation Focused on Relieving Physical Symptoms
https://www.youtube.com/watch?v=q2_UfFIszkY
Hope the rest of your afternoon is calm!
S.C.